package com.eqxiu.ieditor.utils;

import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.servlet.http.HttpServletRequest;

import org.springframework.web.util.UriComponents;
import org.springframework.web.util.UriComponentsBuilder;

/**
 * web工具类.
 * 
 */
public class WebUtil {

	/**
	 * 获取远程访问的IP地址.
	 * 
	 */
	public static String getIpAddress(HttpServletRequest request) {
		String ip = request.getHeader("x-forwarded-for");
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
			if (ip.equals("127.0.0.1")) {
				// 根据网卡取本机配置的IP
				InetAddress inet = null;
				try {
					inet = InetAddress.getLocalHost();
				} catch (UnknownHostException e) {
				}
				ip = inet.getHostAddress();
			}
		}

		// 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
		if (ip != null && ip.length() > 15) { // "***.***.***.***".length() = 15
			if (ip.indexOf(",") > 0) {
				ip = ip.substring(0, ip.indexOf(","));
			}
		}

		return ip;
	}

	/**
	 * 获得编码后的url地址
	 * 
	 * @param url
	 *            url地址
	 * @return
	 */
	public static String encodedUri(String url) {
		UriComponents uriComponents = UriComponentsBuilder.fromHttpUrl(url).build();
		String encodedUri = uriComponents.encode().toUriString();
		return encodedUri;
	}

}
